public class SampleSubClassOne extends SampleSuperClass {
    // Overloaded method with one String Argunemt
    public void printWhatToDo(String str){
        System.debug(str);
    }
    // Overloaded method with out Argunemt
    public void printWhatToDo(){
        System.debug(this.sayWhatToDo());
    }
    
    public override String sayWhatToDo(){
        return 'Do Visualforce workbook ... Overridden';
    }
}